A Low-frequency Passive Seismic Survey in Libya

2009 ◽  
Author(s):  
E. H. Saenger ◽  
A. Torres ◽  
B. Artman
Keyword(s):  
Low Frequency ◽  
Seismic Survey ◽  
Passive Seismic

A Low-frequency Passive Seismic Survey in an Urban Setting in Germany

2009 ◽  
Author(s):  
A. V. Goertz ◽  
B. Schechinger ◽  
M. Koerbe ◽  
P. Krajewski
Keyword(s):  
Low Frequency ◽  
Urban Setting ◽  
Seismic Survey ◽  
Passive Seismic

A passive seismic survey over a gas field: Analysis of low-frequency anomalies

Geophysics ◽  
2009 ◽  
Vol 74 (2) ◽  
pp. O29-O40 ◽  
Author(s):  
Erik H. Saenger ◽  
Stefan M. Schmalholz ◽  
Marc-A. Lambert ◽  
Tung T. Nguyen ◽  
Arnaud Torres ◽  
...  
Keyword(s):  
Low Frequency ◽  
Hydrocarbon Reservoirs ◽  
Field Analysis ◽  
Seismic Survey ◽  
Background Spectrum ◽  
Gas Field ◽  
Partially Saturated ◽  
Tight Gas Reservoir ◽  
Passive Seismic ◽  
Exploration Area

Passive seismic low-frequency (from approximately [Formula: see text]) data have been acquired at several locations around the world. Spectra calculated from these data, acquired over fields with known hydrocarbon accumulations, show common spectral anomalies. Verification of whether these anomalies are common to only a few, many, or all hydrocarbon reservoirs can be provided only if more and detailed results are reported. An extensive survey was carried out above a tight gas reservoir and an adjacent exploration area in Mexico. Data from several hundred stations with three-component broadband seismometers distributed over approximately [Formula: see text] were used for the analysis. Severalhydrocarbon reservoir-related microtremor attributes were calculated, and mapped attributes were compared with known gas intervals, with good agreement. Wells drilled after the survey confirm a predicted high hydrocarbon potential in the exploration area. A preliminary model was developed to explain the source mechanism of those microtremors. Poroelastic effects caused by wave-induced fluid flow and oscillations of different fluid phases are significant processes in the low-frequency range that can modify the omnipresent seismic background spectrum. These processes only occur in partially saturated rocks. We assume that hydrocarbon reservoirs are partially saturated, whereas the surrounding rocks are fully saturated. Our real data observations are consistent with this conceptual model.

scholarly journals Hydrocarbon Prospect Derived from Attributes Analysis on Low-Frequency Passive Seismic Survey: a Case Study from Kalimantan, Indonesia

2017 ◽  
Vol 62 ◽  
pp. 012020
Author(s):  
Billy Sugiartono Prabowo ◽  
Rexha Verdhora Ry ◽  
Andri Dian Nugraha ◽  
Katrine Siska
Keyword(s):  
Low Frequency ◽  
Seismic Survey ◽  
Passive Seismic

Seismic solutions utilizing existing in-mine infrastructure for mineral exploration: A case study from Maseve platinum mine, South Africa

2022 ◽  
Vol 41 (1) ◽  
pp. 54-61
Author(s):  
Moyagabo K. Rapetsoa ◽  
Musa S. D. Manzi ◽  
Mpofana Sihoyiya ◽  
Michael Westgate ◽  
Phumlani Kubeka ◽  
...  
Keyword(s):  
South Africa ◽  
Seismic Data ◽  
Mineral Exploration ◽  
Ground Surface ◽  
Seismic Survey ◽  
Noisy Environment ◽  
Borehole Data ◽  
Passive Seismic ◽  
Below Ground

We demonstrate the application of seismic methods using in-mine infrastructure such as exploration tunnels to image platinum deposits and geologic structures using different acquisition configurations. In 2020, seismic experiments were conducted underground at the Maseve platinum mine in the Bushveld Complex of South Africa. These seismic experiments were part of the Advanced Orebody Knowledge project titled “Developing technologies that will be used to obtain information ahead of the mine face.” In these experiments, we recorded active and passive seismic data using surface nodal arrays and an in-mine seismic land streamer. We focus on analyzing only the in-mine active seismic portion of the survey. The tunnel seismic survey consisted of seven 2D profiles in exploration tunnels, located approximately 550 m below ground surface and a few meters above known platinum deposits. A careful data-processing approach was adopted to enhance high-quality reflections and suppress infrastructure-generated noise. Despite challenges presented by the in-mine noisy environment, we successfully imaged the platinum deposits with the aid of borehole data and geologic models. The results open opportunities to adapt surface-based geophysical instruments to address challenging in-mine environments for mineral exploration.

Pitfalls in the analysis of low frequency passive seismic data

First Break ◽  
2008 ◽  
Vol 26 (6) ◽  
Author(s):  
P. Hanssen ◽  
S. Bussat
Keyword(s):  
Seismic Data ◽  
Low Frequency ◽  
Passive Seismic

Passcal instrument performance during the Tibetan Plateau Passive Seismic Experiment

1993 ◽  
Vol 83 (6) ◽  
pp. 1959-1970
Author(s):  
Thomas J. Owens ◽  
George E. Randall ◽  
Francis T. Wu ◽  
Rongsheng Zeng
Keyword(s):  
Tibetan Plateau ◽  
Extreme Environments ◽  
Low Frequency ◽  
Rocky Mountain ◽  
Spatial Density ◽  
Frequency Noise ◽  
The Tibetan Plateau ◽  
Seismic Experiment ◽  
Deep Earth Structure ◽  
Passive Seismic

Summary The PASSCAL instrumentation performed very well in the Tibetan Plateau Seismic Experiment. This experiment has demonstrated the viability of recording high-quality broadband data at temporary sites in extreme environments. It also highlights some areas where further development is needed. Primarily, more effort is needed to develop more versatile triggering options for the PASSCAL instruments. Such developments could both increase the instrument's success at recording low magnitude teleseismic events for travel-time studies and save disk space when recording local events, thus further increasing the feasibility of long deployments in remote regions. Although the use of the PASSCAL instrument's calibration circuitry for sensor recentering is a valuable technique, more experience is needed in the construction of sensor pads to minimize tilt problems that require site visits to relevel the seismometer such as we experienced at a few sites in the winter. This may also lead to improved low-frequency noise levels, although signals with periods greater than 200 sec can be recovered from these sites. The most exciting aspect of the data we have collected is its broad frequency content and spatial density. We anticipate that this type of experiment will be increasingly useful in the study of lithospheric interactions as well as deep Earth structure. This data was delivered to the IRIS Data Management Center in early September 1993 and is available to the community. Two other broadband passive-seismic experiments, the Baikal Rift experiment (Gao et al. 1992) and the Rocky Mountain Front experiment (Sheehan et al. 1992) should be delivered to the IRIS DMC in the Fall of 1993 as well. Temporary broadband seismic experiments represent an extension of the permanent Global Seismic Network (GSN). We encourage the seismological community to incorporate these data into any research using GSN data in order to maximize the potential utility of this new mode of seismic recording.

Passive Seismic Survey for Cultural Heritage Landslide Risk Assessment

2013 ◽  
pp. 483-489 ◽  
Author(s):  
Daniele Spizzichino ◽  
Claudio Margottini ◽  
Silvia Castellaro ◽  
Francesco Mulargia
Keyword(s):  
Risk Assessment ◽  
Cultural Heritage ◽  
Seismic Survey ◽  
Landslide Risk ◽  
Landslide Risk Assessment ◽  
Passive Seismic

Low frequency passive seismic tomography using Valhall LoFS

2011 ◽  
Author(s):  
A. Mordret ◽  
N.M. Shapiro ◽  
S. Singh ◽  
P. Roux ◽  
O.I. Barkved
Keyword(s):  
Seismic Tomography ◽  
Low Frequency ◽  
Passive Seismic

Low Frequency Seismic Survey at a Gas Storage Reservoir

2011 ◽  
Author(s):  
M. Duclos ◽  
B. Artman ◽  
B. Birkelo ◽  
F. Huguet ◽  
J. F. Dutzer ◽  
...  
Keyword(s):  
Low Frequency ◽  
Gas Storage ◽  
Seismic Survey ◽  
Storage Reservoir
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